I am a US citizen for over 20 years. I want to apply for my sister who gave birth in USA while visiting. Will having a US child expedite the petition?

Under US immigration law, there are only specific categories for family based cases and your sister's having a US citizen child will not expedite your application for her. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.